From: Sandipan Das <sandipan@linux.ibm.com>
To: Florian Weimer <fweimer@redhat.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linuxram@us.ibm.com, aneesh.kumar@linux.ibm.com,
bauerman@linux.ibm.com, mpe@ellerman.id.au
Subject: Re: [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates
Date: Sat, 9 May 2020 01:24:26 +0530 [thread overview]
Message-ID: <a40c364d-e204-1d63-c211-7cdfdccb32e0@linux.ibm.com> (raw)
In-Reply-To: <87blmymhkx.fsf@oldenburg2.str.redhat.com>
Hi Florian,
On 08/05/20 11:31 pm, Florian Weimer wrote:
> * Sandipan Das:
>
>> The Power ISA mandates that all writes to the Authority
>> Mask Register (AMR) must always be preceded as well as
>> succeeded by a context-synchronizing instruction. This
>> applies to both the privileged and unprivileged variants
>> of the Move To AMR instruction.
>
> Ugh. Do you have a reference for that?
>
> We need to fix this in glibc.
>
This is from Table 6 of Chapter 11 in page 1134 of Power
ISA 3.0B. The document can be found here:
https://ibm.ent.box.com/s/1hzcwkwf8rbju5h9iyf44wm94amnlcrv
- Sandipan
WARNING: multiple messages have this Message-ID (diff)
From: Sandipan Das <sandipan@linux.ibm.com>
To: Florian Weimer <fweimer@redhat.com>
Cc: aneesh.kumar@linux.ibm.com, linuxram@us.ibm.com,
linux-mm@kvack.org, linux-kselftest@vger.kernel.org,
akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org,
bauerman@linux.ibm.com
Subject: Re: [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates
Date: Sat, 9 May 2020 01:24:26 +0530 [thread overview]
Message-ID: <a40c364d-e204-1d63-c211-7cdfdccb32e0@linux.ibm.com> (raw)
In-Reply-To: <87blmymhkx.fsf@oldenburg2.str.redhat.com>
Hi Florian,
On 08/05/20 11:31 pm, Florian Weimer wrote:
> * Sandipan Das:
>
>> The Power ISA mandates that all writes to the Authority
>> Mask Register (AMR) must always be preceded as well as
>> succeeded by a context-synchronizing instruction. This
>> applies to both the privileged and unprivileged variants
>> of the Move To AMR instruction.
>
> Ugh. Do you have a reference for that?
>
> We need to fix this in glibc.
>
This is from Table 6 of Chapter 11 in page 1134 of Power
ISA 3.0B. The document can be found here:
https://ibm.ent.box.com/s/1hzcwkwf8rbju5h9iyf44wm94amnlcrv
- Sandipan
next prev parent reply other threads:[~2020-05-08 19:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 17:49 [PATCH 0/2] selftests: vm: pkeys: Some powerpc fixes Sandipan Das
2020-05-08 17:49 ` Sandipan Das
2020-05-08 17:49 ` [PATCH 1/2] selftests: vm: pkeys: Fix powerpc access right definitions Sandipan Das
2020-05-08 17:49 ` Sandipan Das
2020-05-08 17:49 ` [PATCH 2/2] selftests: vm: pkeys: Fix powerpc access right updates Sandipan Das
2020-05-08 17:49 ` Sandipan Das
2020-05-08 18:01 ` Florian Weimer
2020-05-08 18:01 ` Florian Weimer
2020-05-08 19:54 ` Sandipan Das [this message]
2020-05-08 19:54 ` Sandipan Das
2020-05-08 20:03 ` Florian Weimer
2020-05-08 20:03 ` Florian Weimer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=a40c364d-e204-1d63-c211-7cdfdccb32e0@linux.ibm.com \
--to=sandipan@linux.ibm.com \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@linux.ibm.com \
--cc=bauerman@linux.ibm.com \
--cc=fweimer@redhat.com \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=linuxram@us.ibm.com \
--cc=mpe@ellerman.id.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.